Top Forums Shell Programming and Scripting how to change working directories in perl? Post 88271 by megastar on Wednesday 2nd of November 2005 01:55:57 PM
Old 11-02-2005
how to change working directories in perl?

i am new to perl. i am writing a perl script. i want to know how to change the working directories? for ex. i have a perl script in c:\proj\ . i want to run this script in this directory but i need my script to change its working directory to D:\xyz\ dynamically in the script.
your help is appreciated.


Thanks
 

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FindBin(3pm)						 Perl Programmers Reference Guide					      FindBin(3pm)

NAME
FindBin - Locate directory of original perl script SYNOPSIS
use FindBin; use lib "$FindBin::Bin/../lib"; or use FindBin qw($Bin); use lib "$Bin/../lib"; DESCRIPTION
Locates the full path to the script bin directory to allow the use of paths relative to the bin directory. This allows a user to setup a directory tree for some software with directories "<root>/bin" and "<root>/lib", and then the above example will allow the use of modules in the lib directory without knowing where the software tree is installed. If perl is invoked using the -e option or the perl script is read from "STDIN" then FindBin sets both $Bin and $RealBin to the current directory. EXPORTABLE VARIABLES
$Bin - path to bin directory from where script was invoked $Script - basename of script from which perl was invoked $RealBin - $Bin with all links resolved $RealScript - $Script with all links resolved KNOWN ISSUES
If there are two modules using "FindBin" from different directories under the same interpreter, this won't work. Since "FindBin" uses a "BEGIN" block, it'll be executed only once, and only the first caller will get it right. This is a problem under mod_perl and other persistent Perl environments, where you shouldn't use this module. Which also means that you should avoid using "FindBin" in modules that you plan to put on CPAN. To make sure that "FindBin" will work is to call the "again" function: use FindBin; FindBin::again(); # or FindBin->again; In former versions of FindBin there was no "again" function. The workaround was to force the "BEGIN" block to be executed again: delete $INC{'FindBin.pm'}; require FindBin; AUTHORS
FindBin is supported as part of the core perl distribution. Please send bug reports to <perlbug@perl.org> using the perlbug program included with perl. Graham Barr <gbarr@pobox.com> Nick Ing-Simmons <nik@tiuk.ti.com> COPYRIGHT
Copyright (c) 1995 Graham Barr & Nick Ing-Simmons. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.16.2 2012-10-11 FindBin(3pm)

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